GridFree Solution
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GridFree solution is PV system based on ON-GRID / GRID-TIE solution with the main goal to not let energy produced by the system go back to public grid. So, the philosophy is to produce as much energy as you can consume at the moment and/or you can store by your battery storage or other solution for energy storage (e.g. tank water heater).
For more information how on-grid / grid free inverters work, please check following link: GridFree Energy